/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.flowable.common.engine.impl.calendar;

import java.util.Date;

import org.flowable.common.engine.api.FlowableException;
import org.flowable.common.engine.impl.runtime.ClockReader;

/**
 * @author Tom Baeyens
 */
public class DurationBusinessCalendar extends BusinessCalendarImpl {

    public static final String NAME = "duration";

    public DurationBusinessCalendar(ClockReader clockReader) {
        super(clockReader);
    }

    @Override
    public Date resolveDuedate(String duedate, int maxIterations) {
        try {
            DurationHelper dh = new DurationHelper(duedate, clockReader);
            return dh.getDateAfter();
        } catch (Exception e) {
            throw new FlowableException("couldn't resolve duedate: " + e.getMessage(), e);
        }
    }

    // Code below just left in for a while just in case it would be needed
    // again.
    //
    // private static Map<String, Integer> units = new HashMap<String,
    // Integer>();
    // static {
    // units.put("millis", Calendar.MILLISECOND);
    // units.put("seconds", Calendar.SECOND);
    // units.put("second", Calendar.SECOND);
    // units.put("minute", Calendar.MINUTE);
    // units.put("minutes", Calendar.MINUTE);
    // units.put("hour", Calendar.HOUR);
    // units.put("hours", Calendar.HOUR);
    // units.put("day", Calendar.DAY_OF_YEAR);
    // units.put("days", Calendar.DAY_OF_YEAR);
    // units.put("week", Calendar.WEEK_OF_YEAR);
    // units.put("weeks", Calendar.WEEK_OF_YEAR);
    // units.put("month", Calendar.MONTH);
    // units.put("months", Calendar.MONTH);
    // units.put("year", Calendar.YEAR);
    // units.put("years", Calendar.YEAR);
    // }
    //
    // public Date resolveDuedate(String duedate) {
    // Date resolvedDuedate = Clock.getCurrentTime();
    //
    // StringTokenizer tokenizer = new StringTokenizer(duedate, " and ");
    // while (tokenizer.hasMoreTokens()) {
    // String singleUnitQuantity = tokenizer.nextToken();
    // resolvedDuedate = addSingleUnitQuantity(resolvedDuedate,
    // singleUnitQuantity);
    // }
    //
    // return resolvedDuedate;
    // }
    //
    // protected Date addSingleUnitQuantity(Date startDate, String
    // singleUnitQuantity) {
    // int spaceIndex = singleUnitQuantity.indexOf(' ');
    // if (spaceIndex==-1 || singleUnitQuantity.length() > spaceIndex+1) {
    // throw new
    // ActivitiException("invalid duedate format: "+singleUnitQuantity);
    // }
    //
    // String quantityText = singleUnitQuantity.substring(0, spaceIndex);
    // Integer quantity = Integer.valueOf(quantityText);
    //
    // String unitText = singleUnitQuantity
    // .substring(spaceIndex+1)
    // .trim()
    // .toLowerCase();
    //
    // int unit = units.get(unitText);
    //
    // GregorianCalendar calendar = new GregorianCalendar();
    // calendar.setTime(startDate);
    // calendar.add(unit, quantity);
    //
    // return calendar.getTime();
    // }
}
